<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
   "http://www.w3.org/TR/html4/strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>css_menu</title>
	<meta name="author" content="Stark" />
	<!-- Date: 2018-10-13 -->
	<style type="text/css">
		* {
			padding: 0px;
			margin: 0px;
			font-size: 12px;
		}
		#c_header,#c_nav,#c_content,#c_bottom {
			position: relative;
			width: 1100px;
			left: 50%;
			margin-left: -500px;
			border: 1px solid #00f;
		}
		#header,#bottom  {
			height: 70px;
			background: #811;
			color:#fff;
		}
		#nav {
			height: 30px;
			background: #981;
			color: #fff;
		}
		#content{
			background: #eee;
			height: 800px;
		}
		#gz {
			height: 40px;
			filter: alpha(opacoty=80);	/*IE*/
			-moz-opacity: 0.8;			/*Moz+FF*/
			opacity: 0.8;
			background: #000;
			position: fixed;
			width: 100%;
			color: #f00;
			z-index: 99999;	/*在最顶部显示*/
			bottom: 0px;
		}
	</style>
</head>
<body>
	<div id="gz">
		关注我们
		
	</div>
	<div id="header">
		<div id="c_header">顶部图片</div>
	</div>
	<div id="nav">
		<div id="c_nav">导航内容</div>
	</div>
	<div id="content">
		<div id="c_content">内容信息</div>
	</div>
	<div id="bottom">
		<div id="c_bottom">底部信息</div>
	</div>
</body>
</html>

